Door knob



FIG. 1 is a perspective view from the front, right side, and top of a door knob showing my new design.

FIG. 2 is front elevational view thereof.

FIG. 3 is rear elevational view thereof.

FIG. 4 is left side elevational view thereof.

FIG. 5 is right side elevational view thereof.

FIG. 6 is bottom plan view thereof; and,

FIG. 7 is top plan view thereof.

The broken line showing in FIG. 3 is included for the purpose of illustrating a portion of the door knob and forms no part of the claimed design. 

I claim the ornamental design for a door knob, as shown and described. 